Automatic switch for point blades



A. REBORI.

AUTOMATIC $WITCH FOR POINT BLADES.

APPLICATION FILED DEC. 12, 192l- Patented Apr. 11, 1922.

T oaZZ w hom it may concern:

i and angular movement 0 2 a rod or'rods umrses'rarss Parser caries;

ATILIO 31:13am, on BnnnosAIRns, ARGENTINA.

Specificationof Letters Patent.

'A UTOMATIC SWITCE FOR POINT BLADES.

Patented Apr. 11,1922

Application filedDec'ember 12 i921. Serial No. 521,9(33.

be acted upon bythe passage of the-vehicles irrespective of their speed.V

'Il1e main'featu're of my present invention consists inthe fact thattheangular switching .of the points is 'determinedby a rotary which mayscrew or unscrew on the same and by a comb nation of a numberof toothedwheels" or toothed wheels and levers whichmay produce an angularreversal of movement resulting" in a'rotary and angular dis placementofthe-rods and in "consequence in an angular switching of the points.

7 According to my present invention'at the 7 points wherein the rods arelocatedunder the =of'the= rods and in order;that thepointblade I thefixing point blades or at any otherfsuitablepoints the rods carry'on areformed integral with screw threaded portions which are capable ofscrewing or unscrewing in similarly.

screw threaded parts of the' point blade.

In' order that the rotary; and angular movement of I the said rods mayproduce an "angular asfacu'te as -possible'and that the points may bemoved from right to left or from left to right with amaximum lateraldisplacement, the threads should "be'iof the type known as worm screwsand generally there should be at least four ofthem so'th at withaquarterrotation of the rod the point blades will" be fdispla ced a'distance equal to the'pitch of one screw-thread. r

The main object in p'rovi'ling as many l screw threads as possible is tofacilitate a lfullj movement of the pointlblade with a 7 maximum rotaryand angulardisplacement be" firmly pushed and returned against: the

sides of the rails :with amaXimum pressure;

In 'asingIe switch poiiitthe' rod-or axle need not run across thetrack,'='it-being sufli cient:thatjsaid rodlbe'of a length to enable "ofthe "toothed wheels 'and lever required for the maneuvrea v "life t lWheel -aaa path, axle,

original position.

of thescrew threaded part and land said toothed wheel meshes with and isdriven by a second tootheld wheel, the latter turning clockwise, thefirst toothed wheel together with the axle will'turn' counterclockwise.Should the axle also carry a fixed lever, when turning counterclockwise,said i lever Wlll fall tothe left and the blade will be carried, forinstancefrom right to left; It the lever is'carried to the right, thepoint blade will also be c arried to theright and the second toothedwheel be r'eturnedtoiitsi It is obvious that the displacement of'thepoint blade is 'due to the fact that the rotary motion of the axlelinone direction screws, and in "the other direction unscrews, upon' theblade; and since the saidaxleis incapable er.- lengthwise displacement,thepoint bladezwill be forced to lateral displacement in one directionor the other accordingly.

- The double of four, point switchis based on the same principle.According to, circumstances in "double, switches a set of fourtoothedwheels andtwo orfour levers, or'two sets of three toothed wheelswithfour levers f or without any lever, 'oi-five or more toothed wheelswithoutlevers maybe used.- p The screw threads may bejallclockwi'se orall counterclockwise, or one clockw se and the may; be required -for thelateral movements otea'ch pair of point bladesfl" I f The toothed wheelsor levers may be placed between both, rails'or at thesides ofthe-track"- as desired The locomotivefor first vehicle of thejtrain; orthe vehicle or car itself incase there is one Vehicle only,'should; beprovided with'suitable-racksi or'levers so as to act uponfthetoothedwheelbrlevers V of the axle in" order 'to switch the points'before the wheels of the vehicle reachthemfj r 1st. Due to ing of anaxle fixed ina lateral direction,

the samedistance and in'fthesame direction,

thisbeing the main causeofmost oi the f Some of the many advantageswhich'may be obtained i-vitl-iimy improved 1 switchjarej Vasfollows'lf"l the fact that the s 'witching of the pointslis produced by} theangular: turnother counterclockwise or 'vice versa,and'fo r eachcombination of toothed wheels which .105 V which axle cannot "follow themovement ,of j

; theblade said blades" will'not be displaced 3 during the passage ofthe train, tramway etc.

N 2nd. In the best known switches the rod i and the point blade run"simultaneously for railments at the points. According to my presentinvention an absolute immobiliza tion of the points is obtained, thepoint blades being firmly held against the side of the rails by a singlemovement and by the same vehicle.

3rd. In ordinary tramear switches the usual bevelled part for theintroduction of the operating lever may be omitted.

4th. Due to the quick and energetic action of the device any stone-likematerial which may have been introduced between blade and rail is easilypulverized.

5th. At night orwhen the track is flooded, the driver need not feel forthe points and he may simply advance, setting the right levers inposition, fully assured that he will set the right point or follow it ifit was already switched on.

In order that my present invention may be clearly understood and easilycarried into practice I have shown two embodiments of the Same in theappended drawings wherein.

Fig. 1 is a plan view oi the improved invention as used with doubleswitch.

v Fig. 2 is a like view as applied to a single switch.

Fig. 3 shows diagrammatically the disposition of the axleand toothedwheels of a double switch.

Fig. 4 shows similarly the same appliance as used with the singleswitchof Fig. 2.

Fig. 5 is a diagram showing the toothed wheel and levers for a singleswitch.

Fig. 6 shows the manner iuwhich the screw threaded portions of the axlesare placed in'respector" the point blades.

Fig. 7 is a view similar to Fig. 5, but as applied to a double switchaccording to Figures 1 and 3.

. Fig. 8 is a side view of the position of the point blades in a doubleswitch and finally, Figure 9 is a plan view of the plate shown in Figure7 illustrating the position of. the several slots and guideways for theoperating levers. 7

Like characters of reference denote the same or like parts throughoutthe said drawings.

Referring now'to the embodiments represented, Figure-1 shows a doubleswitch, in

. WhiOh the screw threaded portions of the axles 5 and 6 are indicatedat 1,2, 3, and l.

AB is a right side track, CD. is the central or main track-and EF is theleft side track.

The point blades are indicated at 7, 8, 9, and

l0. The movement of the blades is produced as follows; In the saidfigure the point blades are switched on for the right-hand 60,

siding AB. In order to switch them on for the main track CD, the freegear 11 on axle 5 is rotated backwards, said wheel meshing with a gear12 fixed to the axle 6 which corresponds to the point blades 9 and 10.In consequence, these later will move to the right (in the position ofthe drawings). Should the points be switched on to the letthand sidingIDF the toothed wheel 13 is actuated, said wheel being fixed to the axle5 which corresponds to the point blades 7 and 8 and these later willmove towardsthe right, against the point blades 9 and 10. Now in orderto switch on the points to the main track CD the free rotating toothedwheel 16 is acted upon, this latter meshing with the free toothed wheel17 on axle 5 and this in turn with the toothed wheel 18 fixed to theyaxle 6-corresponding to the point blades 9 and 10. Such reverse movements or" the point blades is due to the fact that the blades 7-3 (axle5) have their screws 1 and 4 rightwards and the blades 9 and 10 (axle 6)have their screws (2 and 3) lettwards and that they are acted upon by anumber of toothed wheels as shown in the drawings.

The screw threads might be all to the right or all to the left but insuch case the number of toothed wheels as shown in the drawings wouldhaveto be changed. The arrows at the side of each of the toothed wheelsshow the direction of their rotation when turned forward and the arrowsparallel to the axles 5 and 6 show the direction of movement of thepoint blades when acted upon in the direction of such first namedarrows. I V I hen the set of gear wheels 13 and 1112 is turning to thedirection of the arrows, the toothed wheels Me-4.5 and 1617-j18 areturning in a direction opposite to that shown by the said arrows andwhen these later are turning in the direction of their respectivearrows, the first named,-that is 13, 11--12' will turn in a directionopposite to that shown by their 'respectivearrows. Should the switchingbe double, thatis. when the "four point blades are to be. moved togetherWhen the gear wheel 13 is turned to move the point blades to'the rightfor instance, the gear wheel 14 will be turned in an opposite directionand in consequence this latter will be ready to be acted upon to move topoint blades to the left. Y

Figure 2 shows a single switch. H is the main track and K the side trackto the right. The same principle asused in Figure l'is applied to thepresent" embodiment. On

turning the free gear whee1,21,the gear wheel 22 fixed to the axle20isalso turned and this later by means of the leftwards' screwthreadedportion 19 movesthe point blade 24: to the right. On acting now directlyon the gear wheel 23 fixed on the same axle 20, the point blade will bepressed to the left and the free gear wheel 21 will return to itsoriginal position. I 2 Figures 3 and 4 show more clearly the gearing ofFigures 1 and 2 respectively.

Figure 5 shows the working of the switch in Figures 2 and 4 and Figure 7shows the working of the-switch of Figures 1 and 3, but as acted uponbymeans of'lever arm.

Figure 5 shows gear wheels21 and .22, and axle above mentioned, and alsoshows a' metal plate 27 provided witha guideway 28 for the operatinglever fixed to the body of the vehicle, in order to engage the lever armfixed to the axle of the gear 21, this latter-meshing with the gearwheel 22'. On

completing the movement, (and on completing the movement of the pointblades) the lever arm 25 is carried to 26. Figure 7 rep-- resents thecorresponding parts for the double switch of Figures-1 and 3; and Flgure6 shows the right-hand threaded portions 3 and 4 of the axles 6 and 5,and also 4 shows the threaded openings 29 in the blades 8 and 10. V

Figure 8 shows two point blades, a long one 7 and a short one 9,together with their openings 29. Figure 9 shows a metal plate 27 as usedin the embodiment of Figure 1,

said plate being provided with guideways' 28 and slots 30 for thepassage of the lever arms 25 or of the and 11. V r Y I declare that whatI claim is V 1. An automatic switch for the pointblades of rail tramwaysand the like comgear wheels 4, 16, 13

prising an axle rotatably 'mounted' but incapable of lengthwisemovement, said axle being provided. with a iscrewthreaded portioncapable of screwing and unscrewingln correspondingly screwthreadedvorifices in the body of the point blade, and setsof gear wheels capableof being turned by the pas sage of the vehicle so as to rotate said axlein either direction, substantially as hereinment and carryingscrewthreaded' portions capableof screwing and unscrew ng 1n thecorresponding point blades according "to their direction of rotation,and means for turning said axles in either direction, substantially ashereinbefore described and-for the purposes set forth.

3. An automatic switch for theolpoint blades of rail, tramways and thelike cornprising a number of axles corresponding to the number of pairsof pointbladesin the switch,"each being provided with screw-- threadedportions capable of screwingand unscrewing in the corresponding pointblades, said axles being mounted to rotate but'incapable' of lengthwisemovement, gear wheels mounted on the said axles, and lever arms forturning the said gear .wheels,sub-

stantially as herein described and for the v purposes set forth. v s v'In testimony whereof I aflix my signature.

; A'IVILIVYO REBo r-

